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I notice my HTC Desire fetches http://xtra3.gpsonextra.net/xtra.bin when it boots (and before I enter the PIN).

What is that ?

Here's the HTTP Request sent:

GET /xtra.bin HTTP/1.1
Accept: */*, application/vnd.wap.mms-message, application/vnd.wap.sic
x-wap-profile: http://www.openmobilealliance.org/tech/profiles/UAPROF/ccppschema-20021212#
Host: xtra3.gpsonextra.net
Connection: Keep-Alive
User-Agent: Android
share|improve this question
up vote 16 down vote accepted

That is done by gpsd. The XTRA files are the current GPS Almanac. The location of where to download the XTRA files to is defined in /system/etc/gps.conf.

These files contain data that speed up the GPS, which will result in faster GPS position fixes.

share|improve this answer
    
I noticed my moto e is making this request, but i dont know if my data provider has blocked this dns and the request is not been resolved. Since i can only wireshark while the device is connected to wifi, i'm not able to make a tcp dump or something like that while the device is on mobile network to know if the request is getting unresolved. Any thoughts? – AlexSanchez Oct 15 '15 at 23:06
    
Do you have any idea whats going on? in my case. – AlexSanchez Oct 19 '15 at 16:19
    
I Post a question here – AlexSanchez Oct 19 '15 at 17:47

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